package http import ( "net/http" "strings" "v2ray.com/core/common/net" ) func ParseXForwardedFor(header http.Header) []net.Address { xff := header.Get("X-Forwarded-For") if len(xff) == 0 { return nil } list := strings.Split(xff, ",") addrs := make([]net.Address, 0, len(list)) for _, proxy := range list { addrs = append(addrs, net.ParseAddress(proxy)) } return addrs } func RemoveHopByHopHeaders(header http.Header) { // Strip hop-by-hop header based on RFC: // http://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html#sec13.5.1 // https://www.mnot.net/blog/2011/07/11/what_proxies_must_do header.Del("Proxy-Connection") header.Del("Proxy-Authenticate") header.Del("Proxy-Authorization") header.Del("TE") header.Del("Trailers") header.Del("Transfer-Encoding") header.Del("Upgrade") connections := header.Get("Connection") header.Del("Connection") if len(connections) == 0 { return } for _, h := range strings.Split(connections, ",") { header.Del(strings.TrimSpace(h)) } }